I have a version of Alfapower EDO Simm for a500 but I can not recognize any simm module I have from 4 to 6 MB. The jumpers are correct but does not work.
I have heard that perhaps should be FMP simms, I have no idea if my simms are FPM or not.
Anyone know if the Alfapower simm modules only work with FMP? (must be 72c)

I really do not know what to do, I spent 130 euros on this controller and the memories do not work, only works on HD.

http://imageshack.us/photo/my-images/843/jumpercorrect.jpg/

Last edited by natamix on 08-May-2012 at 11:27 PM.

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anyone help me?

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@natamix

Do you know how fast the ram is?

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@natamix

Some times the problem is figuring how much memory the RAM stick is.
By looking at your pictures I would try removing the test jumper, it is currently on.

If you are using a 4M module, the jumprers are confiogured wrong. Set JWS0 to the two left most pins and JWS1 to the right most pins. After that, if your computer still doesn't see the ram, try the other slot.

I hope this helps.


Drewlio77

@Dirk-B
70 ns

@Drewlio77
Well, is that at the time of the instant photo had the jumper test to test the utility of the floppy RAM TEST AlfaPw also with negative results.
As I say, the jumper of the active memory simms do not work either.

in the image at that time had a 6 mb simm and the bridge is correct according to the drawing board.
Sims worked according to their antique owners in the AlfaPW.
try the other slot, also fail

I've also tested in another A500 and does not work.

Last edited by natamix on 13-May-2012 at 02:53 PM.

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@natamix

Here is a link for the manual, incase you dont have one. It covers several models including yours.

Link

It also would't hurt to try other memory module types such as non-EDO types. I have heard that EDO memory doesn't work with some types of memeory controllers.

Drewliio77

Last edited by Drewlio77 on 13-May-2012 at 11:21 PM.
Last edited by Drewlio77 on 13-May-2012 at 11:19 PM.
Last edited by Drewlio77 on 13-May-2012 at 10:53 PM.

@Drewlio77

if I have the manual but as I say, I put everything correctly.
Thanks, I had not heard of the NON EDO, try to get some. Are the 30 pin?

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@natamix

There are 3 types of DRAM: normal, EDO and FPM. EDO and FPM are both made to speed up traffic when many bytes are accessed sequentially, just slightly different solutions (with FPM you can access random bytes within a row (page) slightly faster, with EDO you access sequential bytes only, but 5% faster than with FPM).

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This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

@natamix

They are 72 Pin Simms like the EDO RAM. I personally had p[roblems with EDO RAM on the Blizzard 060 baord. I had to use FPM or regular memory. If you go on e-bay, any 72 pin Simms tagged for Amiga accelerator cards will work.

I have a drawer full of 4 to 8 meg modules if you want some to test (they work on all of my Amiga cards).

Drewliio77

@Drewlio77
@olegil

Thanks, as I said, the modules I have are 4 and 6 MB EDO quite old and the same time AlfaPw but not know what kind, according to former owners worked. I think the sockets are broken.

Anyway if I wanted to try FPMS / non EDO, better if of 80 ns.

PM @Drewlio 77

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I forgot a detail, with the memory LED activated without inserting any module, it also gives me error in Workbench 2.1 and 1.3 crash.
That's what I think it may be damaged sockets.

Last edited by natamix on 16-May-2012 at 07:29 PM.
Last edited by natamix on 16-May-2012 at 07:26 PM.

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@natamix

I'm willing to bet nearly everything that you don't have a 6MB SIMM. And EDO didn't really start happening until people were using at least 8MB modules, don't think I ever saw an EDO module of 4MB. But I could be wrong.

1: Are you sure you have EDO?
2: Are you sure the board supports EDO? I sincerely doubt that such an old product would support it. I've read statements to the effect that EDO is backwards compatible, but I've also tried running one and not managed it at all once. Don't exactly remember which board I tried it in, though.

_________________
This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

@olegil
I think I have explained everything.
The manual of controler says nothing about what type of memory used, I can not find info on Inet
Hope you're right
I'm trying to get modules FPM or non EDO to check

Last edited by natamix on 16-May-2012 at 11:29 PM.
Last edited by natamix on 16-May-2012 at 11:29 PM.

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@natamix

Well, when that manual came out I don't think EDO or even FPM had even been invented yet

_________________
This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

@olegil

I have a stack of 4MB modules somewhere that should work nicely in that board. Now if only I knew where said "somewhere" was located.

_________________
This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

@olegil
well, my controller is the year 92/93 and at that time the 386/486 dominated the earth so I think he used the type of memory used by the 386/486. So understand that I need to say NO EDO memory?.

EDO kaput
FPM kaput
NON EDO ok
is that?

say you have modules that are sure to work,
the last thing I did not understand, you say you do not know where have the simms?

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@natamix

I mean I know I have a whole stack of 4MB modules, I just don't know where they are. I've moved since last saw them.

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This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

@olegil
How do I find modules 72c of 4 mb NOT EDO and NOT FPM?
on EBAY only see FMP and EDO

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Information found in an old thread is someone that sold Amibay http://www.amibay.com/showthread.php?t=17540 a controller like mine with two 4-mb simms, public images of the controller with the simms and the showconfig system in which we see that it works. By editing software I have zoom and image brightness and have found the number that is written on the chips. IBM B1D13600A-70 1X36 FP.

I need these simms or one of equal characteristics, especially NON EDO, FPM be.

in the numbers that are on the chip, if they carry a 5 is EDO.
5 = EDO
0 = FPM

I have to flee the 5 on everything.

for now can not find this model available for inet

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